[GRASS-dev] [bug #5028] (grass) simwe needs indirectly linked vector libs

[Markus Neteler]

Glynn Clements wrote on 08/21/2006 06:19 AM:
> Request Tracker wrote:
>
>   
>> this bug's URL: http://intevation.de/rt/webrt?serial_num=5028
>> -------------------------------------------------------------------------
>>
>> Subject: simwe needs indirectly linked vector libs
>>
>> Platform: Mac OSX
>> grass obtained from: Trento Italy site
>> grass binary for platform: Compiled from Sources
>> GRASS Version: 6.1+
>>
>> Some of the libraries needed by the simwe/simlib themselves use the vector libraries, but the vector 
>> libraries are not directly linked into simlib.  This causes a build failure in many cases because the 
>> linker can't find those indirectly linked libraries (at least with the Mac OS X linker).
>>
>> When it's a first-time build or a version upgrade, there is no GRASS installed.  Or in a SDK build (ie 
>> on Mac OS X), the SDK overrides the usual system paths, and GRASS does not exist in the SDK.  
>> Another possible problem is if the vector libs get new functions, a previously installed GRASS' vector 
>> libs will be used and not have those functions.
>>
>> A quick fix is to install GRASS after simwe build failed, so at least the libraries are available, then 
>> rebuild simwe.  But this is not good - it doesn't work for the SDK case, and it's possible the build will 
>> go directly into a distribution install, and not a normal install at all.
>>
>> To fix, edit simwe/simlib/makefile: add $(VECTLIB) to EXTRA_LIBS, and add $(VECTDEP) to 
>> DEPENDENCIES.  At least that's what I do for now.
>>     
>
> Ideally, this should be fixed by adding any required libraries to the
> library variable in Grass.make.in.
>
> The individual Makefiles should only need to specify libraries which
> the module uses directly (i.e. where the module's source code contains
> a call to a function in that library). The build system should take
> care of the rest.
>
> For shared GRASS libraries, the dependencies shouldn't be necessary. 
> If the linker only finds them when there is an existing installation,
> that implies that the link flags need something similar to the
> -Wl,-rpath-link,${LIB_RUNTIME_DIR} switch which is used on Linux.
>
> Static libraries don't have dependency information, so it needs to be
> specified explicitly in Grass.make.
>
>   
I have made the changes for both LIDAR and SIMWE, I hope I got it right.

Markus